Aerodynamic modeling and stability analysis of a high-speed train under strong rain and crosswind conditions

作者：Shao, Xue-ming; Wan, Jun; Chen, Da-wei; Xiong, Hong-bing^*

来源：Journal of Zhejiang University-Science A(Applied Physics & Engineering), 2011, 12(12): 964-970.

DOI：10.1631/jzus.A11GT001

• High-speed train
• Aerodynamic characteristics
• Multiphase flow
• Rain
• Crosswind
• Overturning

With the development of high-speed train, it is considerably concerned about the aerodynamic characteristics and operation safety issues of the high-speed train under extreme weather conditions. The aerodynamic performance of a high-speed train under heavy rain and strong crosswind conditions are modeled using the Eulerian two-phase model in this paper. The impact of heavy rainfall on train aerodynamics is investigated, coupling heavy rain and a strong crosswind. Results show that the lift force, side force, and rolling moment of the train increase significantly with wind speed up to 40 m/s under a rainfall rate of 60 mm/h. when considering the rain and wind conditions. The increases of the lift force, side force, and rolling moment may deteriorate the train operating safety and cause the train to overturn. A quasi-static stability analysis based on the moment balance is used to determine the limit safety speed of a train under different rain and wind levels. The results can provide a frame of reference for the train safe operation under strong rain and crosswind conditions.

• 出版日期2011-12
• 单位浙江大学